Penetration Testers (CHECK / CREST)

Cyber Guarded Ltd; Remote; GBP 59,000 - 70,000; Full time

Job summary

A cyber security company in the UK is seeking an experienced Senior Penetration Tester to deliver high-assurance testing across infrastructure, web, cloud, and OT environments. This fully remote role requires 3–5+ years of experience in penetration testing, with specific qualifications in CHECK or CREST. Candidates must be UK or Irish citizens with a strong grasp of network security and relevant tools like Burp and Kali. The position offers a supportive team environment along with private healthcare and professional development opportunities.

Benefits

Private healthcare

Pension

Sick pay

25 days leave + statutory holidays

Professional development & certification support

Qualifications

• 3–5+ years professional penetration testing experience.
• CHECK Team Member / Leader OR CREST CRT or ready to pass soon.
• Strong grasp of networks, AD, Linux/Windows internals, and web technologies.

Responsibilities

• Deliver CHECK-level infrastructure, web, cloud and OT penetration tests.
• Own assessments end-to-end: scoping > testing > reporting > client debriefs.
• Develop tooling, methodologies, and contribute to internal R&D.

Skills

Penetration testing

Network security

Web technologies

Scripting

Tools

Burp

Kali

Metasploit

Nessus

Job description

Hiring : Senior Penetration Tester (CHECK / CREST) – Fully Remote (GB based)

Salary : Up to £70k based on experience | Travel : Client sites when needed | Clearance : Must be eligible for SC

Cyber Guarded Ltd is expanding! We’re a long-established, independent cyber security company and the leading NCSC CHECK provider in Northern Ireland now growing across the UK.

We’re looking for an experienced Penetration Tester (not entry level) to deliver high-assurance testing across infrastructure, web, cloud and OT environments. This is a fully remote role within Great Britain, with occasional client-site visits.

What You’ll Do

• Deliver CHECK-level infrastructure, web, cloud and OT penetration tests
• Own assessments end-to-end : scoping > testing > reporting > client debriefs
• Develop tooling, methodologies, and contribute to internal R&D
• Work with a supportive, senior technical team on meaningful real-world challenges

What We’re Looking For

• 3–5+ years professional penetration testing experience
• CHECK Team Member / Leader OR CREST CRT (or ready to pass soon)
• Strong grasp of networks, AD, Linux / Windows internals, and web technologies
• Proficiency with Burp, Kali, Metasploit, Nessus, scripting, etc.
• Must be a UK or Irish citizen, SC-clearable, 5 years UK residency
• Based in Great Britain (England / Scotland / Wales) – not NI

What We Offer

• Fully remote working (GB based)
• Flexibility + supportive, down-to-­earth team
• Private healthcare, pension, sick pay
• 25 days leave + statutory holidays
• Professional development & certification support
• Exposure to diverse clients and critical industry environments

Shortlisted applicants only will be contacted